Composite board.



L. A. DEUTHER.

GOMIOSITE BOARD.

APPLICATION FILED JUNE 30, 1909.

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@nmm rare LORENZ A. DEUTHER, OF BUFFALO, YORK.

COMPOSITE BOARD.

Specification of Letters Patent.

Patented June M, 19 10.

Application filed June 30, 1909. Serial No. 505,184.

T 0 all whom it may concern:

Be it known that I, LORENZ Dnnrnnn, "a citizen of the United States,res1ding at Buffalo, in the county of Erie and State of New York, have invented acertain new and useful Improvement in Composite Boards, of which the following is a specification.

This invention relates to improvements in composite boards which are utilized as flooring, table tops and for other purposes and which consists of a series of laminae having their faces or sides superimposed on and secured to each other and'their edges exposed to form the opposite sides or faces of the composite board.

The object of the invention is to produce a board of this character in such manner and of such material that 'it will not warp, nor split with ordinary usage and will be cheaper in construction as well as Stiller and stronger and more ornamental than any ordinary board formed from one section of wood.

The invention also relates ,.,,to certain details of construction which will be hereinafter described and claimed, reference being had to the accompanying drawings, in which,

Figure 1 is an end view of a block of the composite board. Fig. 2 is an enlarged fragmentary transverse section on line (b a, Fig. 1. Fig. 3 is a perspective view of a block of the composite board'showing the manner in which the boards are cut therefrom. Fig: 4 is an enlarged fragmentary end view of a different form of the composite board.

In referring to the drawings in detail like numerals designate like parts.

Two forms of this improved composite board are illustrated in the accompanying drawings and will be hereinafterdescribed.

In the form shown in Figs. 1, 2 and 3, which has rounded corners, an inner core which is composed of laminae or layers of wood and paper 1 and 2 is fitted within an outer portion. The laminae of the inner core are fitted 'in alternate arrangement with their sides or faces in contact and'securcd together and extend in astraight direction. The object in interposing layers of paper between the layers of wood is not only to cheapen the cost of production of the composite board but also tostitfen and strengthen the board and to prevent warping, the paper serving as a filler to separate the wood laminae. The outer portion is wound around the inner core in alternate spiral layers and consists of two strips of paper and wood 3 and 4. The grain of the wood in the laminae 1 runs longitudinally of the layers so that it may be bent readily around the corners Without splitting. The Wood of whichthe outer spiral layers is composed is preferably cut in curved or spiral cuts from a suitable log so that it will be in one continuous piece and it is bent around the inner core at substantially right angles to its out so that the grain will extend longitudinally of the layers as heretofore specified. This form of board is constructed by first forming the core, then winding the outer spiral layers around the core, then cutting the laminated formation,

which is comparatively long, into sections of suitable thickness to form the boards.

In the form shown in Fig. 4 which is of a rectangular or square form, the inner core is formed of alternate straight laminae of paper and wood 5 and 6 and alternate straight outer laminae of paper and wood 7 and 8. The outer laminae are arranged so that they lap at their ends as shown in Fig. 4, and are in four sections, two side sections and two end sections which surround the inner core. The i lamina: or layers are secured together by glue or other suitable adhesive with their edges exposed to constitute the faces or sides of the completed board. Vhile lamina of paper are preferably employed in conjunction with the wood layers, they might be dispensed with or other suitable material might be used in lieu thereof.

The boards'are cut with a suitable saw from the solid block as shown in dotted lines-in Fig. 3, each line representing a out. In this manner. a very thin board of exceed ing stiffness and strength and which will not warp or shrink is produced. c

I claim 1. A board composedof a series of laminae of wood and paper superimposed in alternate arrangement and having their sides or faces secured in contact and their edges exposed to form the sides of the board.

2. In a composite board an inner core composed of a series of straight laminae-of wood and paper superimposed in alternate arrangement and an outer portion surrounding the inner core and also composed of aseries of laminae of wood and paper superimposed in alternate arrangement.

3. In a composite'board 'an inner core saris pssed to con- LQTENZE A. DEUTHE R.

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